* Shutdown sequencer before stopping p2p

* Check p2p isn't also disabled
Co-authored-by: Sebastian Stammler <seb@oplabs.co>

* Remove missed time.Sleep

* Fix up use of SetupP2P.Disabled

* Revert error check after RPC boundary

* Add comment about context for StopSequencer

* Add Config.p2pEnabled

* op-node: Make Config.P2PEnabled public

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Co-authored-by: Sebastian Stammler <seb@oplabs.co>